ValueAnomalyRankMean

Divisional Palmer Z-Index

November 1991 - January 1992

-4-3-2-11234

Washington (Hover over a Climate Division)

Z-IndexPalmer Z-Index: -0.19

Anomaly: -0.16

Rank: 61st Driest

Mean: -0.03

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November 1991 - January 1992 Washington Divisional Palmer Z-Index

Climate Division	Value	Anomaly	Rank 130 Years	1901-2000 Mean
1. West Olympic Coast	0.28	0.29	77	-0.01
2. North East Olympic San Juan	0.06	0.01	70	0.05
3. Puget Sound Lowlands	-0.36	-0.32	52	-0.04
4. East Olympic Cascade Foothills	0.34	0.35	83	-0.01
5. Cascade Mountains West	0.32	0.35	85	-0.03
6. East Slope Cascades	-0.50	-0.48	47	-0.01
7. Okanogan Big Bend	-0.32	-0.33	55	0.00
8. Central Basin	-0.51	-0.57	45	0.06
9. Northeastern	-0.29	-0.16	54	-0.13
10. Palouse Blue Mountains	-0.64	-0.71	46	0.07

Citing This Page

• NOAA National Centers for Environmental information, Climate at a Glance: Divisional Mapping, published June 2025, retrieved on June 20, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/divisional/mapping